CN103776828A - Color variation label for monitoring freshness activity of food and preparation method thereof - Google Patents
Color variation label for monitoring freshness activity of food and preparation method thereof Download PDFInfo
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- CN103776828A CN103776828A CN201410051466.4A CN201410051466A CN103776828A CN 103776828 A CN103776828 A CN 103776828A CN 201410051466 A CN201410051466 A CN 201410051466A CN 103776828 A CN103776828 A CN 103776828A
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Abstract
The invention provides a color variation label for monitoring freshness activity of food, and the color variation label is used for displaying the freshness activity of the food. The color variation label comprises a developing liquid consisting of an indicator agent, a connecting material, solvent and additives, and the developing liquid comprises the following ingredients by weight percent: 0.52 to 2.13 percent of indicator agent, 28.38 to 49.60 percent of connecting material, 47.17 to 70.03 percent of solvent and 0 to 4.13 percent of additive. The developing liquid is smeared or printed onto a transparent food packaging film to form a color variation label. The color variation label is easy to realize, and the freshness degree of the food can be rapidly judged by people.
Description
Technical field
The invention belongs to food identification technology field, be specifically related to a kind of change color label of monitoring the fresh activity of food and preparation method thereof.
Background technology
The food such as various meat, seafood, milk egg products, in the accumulating process of circulation, are accompanied by metabolic generation, and microorganism and bacterium constantly breed, and food spoilage degree is also in constantly aggravation.In food spoilage process, can discharge biogenic amine (putrescine, cadaverine, histamine, tyrasamine etc.), in the time that the concentration of biogenic amine reaches certain value, eater can produce the bad reactions such as dizziness, uncomfortable in chest, vomiting.Although marked the shelf-life of food in some packagings for foodstuff, but the fresh activity of food can not reflect intuitively, need strictly speaking to detect judge this food whether can safe edible by relevant instrument as high performance liquid chromatograph HPLC or gas chromatograph-mass spectrometer GC-MS etc. by quality testing department.This quality inspection procedure process complexity, length consuming time, testing cost costliness, can not give consumer warning efficiently.
Current intelligent color label is worldwide just at the early-stage, and only a few developed country such as the U.S., Japan, Canada has realized the intelligent packaging of part commodity, and a lot of aspect is also in experimental study and exploratory stage.China's research is in this respect started late, and development also relatively lags behind, almost or blank out.Therefore, current developing a kind ofly can judge that the change color label of the fresh activity of food is necessary fast.
Summary of the invention
Technical matters to be solved by this invention is for above shortcomings in prior art, a kind of change color label of monitoring the fresh activity of food and preparation method thereof is provided, technique is simple, easy to use, prepared change color label is for can be along with food is putrid and deteriorated and significantly change color gradually in packaging for foodstuff, become gradually green by initial yellow, then become blueness, be convenient to people and identify fast food freshness.
The technical scheme that solution the technology of the present invention problem adopts is the change color label of the fresh activity of this monitoring food, be used for showing food freshness, the nitrite ion that it contains indicator, binder, solvent, auxiliary agent composition, nitrite ion comprises the component of following weight proportion:
Nitrite ion is applied or is printed on transparent food packing film, form change color label.
Described change color label is for packaging for foodstuff, along with food is putrid and deteriorated and significantly change color gradually, becomes gradually green, then become blueness by initial yellow.In the time that label color becomes green, illustrate that food spoilage degree is not very high, can also eat; In the time that change color label color becomes blueness, food is seriously corrupt, can not eat.
Preferably, described indicator is bromcresol green; Described binder is the one in acrylate, polyamide or the acetate fiber resin of ethanol-soluble type; Described solvent is the one in ethanol, ethylene glycol, propyl alcohol or butanols; Described auxiliary agent is nano silicon.Nano silicon specific surface area is large, can improve gas absorption performance, has improved the sensitivity of the biogenic amine that nitrite ion distributes food.
Preferably, described transparent food packing film is the one in polyethylene film, polypropylene film, polyvinyl chloride film or mylar.
Preferably, when described change color label is used for packaging for foodstuff, when food is fresh, this label color is yellow; In the time that food is putrid and deteriorated gradually during accumulating, the color of change color label becomes green gradually, then becomes blueness, is greater than 6 with the aberration of priming color.
The present invention also provides the preparation method of the change color label of the fresh activity of above-mentioned monitoring food, and it comprises the following steps:
(1) preparation of nitrite ion: under normal temperature, binder and solvent are positioned in closed container and are mixed, then add auxiliary agent and indicator, ultrasonic being uniformly dispersed obtains nitrite ion;
The weight proportion of each component is:
(2) preparation of change color label: step (1) gained nitrite ion is applied or is printed on transparent food packing film, form change color label.
Can nitrite ion be applied or is printed on transparent food packing film by laminating machine, coating machine, spin coating instrument or printing machine.
Preferably, the described ultrasonic dispersion of step (1) is to adopt ultrasonic dispersions 1-3 time, 5-10 minute at every turn, at every turn interval time 2-5 minute.
Preferably, the described transparent food packing film of step (2) is applying or printing front surface carries out corona treatment, makes more than the surface of transparent food packing film can reach 45 dyne.Corona treatment can improve membraneous material surface can, be convenient to nitrite ion and be attached to the surface of membraneous material.
The invention has the beneficial effects as follows: adopt the method that is simple and easy to realize to prepare at normal temperatures the change color label of the fresh activity of monitoring food, this change color label is easy to use, it is sensitive to develop the color, can show the fresh and alive degree of food in packaging for foodstuff, along with food is putrid and deteriorated and significantly change color gradually, become gradually green by initial yellow, become again blueness, be convenient to people and identify food freshness, guarantee food security.
Accompanying drawing explanation
Fig. 1 is change color label prepared in specific embodiment of the present invention change color schematic diagram while using.
Embodiment
For making those skilled in the art understand better technical scheme of the present invention, below in conjunction with accompanying drawing, the present invention is described in further detail.
The embodiment of the present invention provides a kind of change color label and preparation method thereof, configures in proportion nitrite ion, then nitrite ion is applied or is printed on transparent food packing film, forms change color label.It is yellow that change color label is initially.
In the embodiment of the present invention, ultrasonic instrument used is the kq2200b of Kunshan Ultrasonic Instruments Co., Ltd. type Ultrasound Instrument, and power is 100W.
Embodiment mono-
Take 2.5g acrylate, be dissolved in 5.0g ethanol, magnetic agitation 5 minutes, mixes; Add again 0.1g bromcresol green, under normal temperature airtight condition, adopt ultrasonic dispersion 3 times, each 5 minutes, each 2 minutes interval times, be configured to nitrite ion.Nitrite ion is uniformly coated on the PE of corona treatment film (45 dyne) surface with coating machine, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=87.62, a
*=8.27, b
*=107.57), (L=74.38, a
*=-21.84, b
*=73.51), (L=36.94, a
*=-9.96, b
*=-67.23).
Embodiment bis-
Take 2.1g acrylate, be dissolved in 2.5g ethylene glycol, magnetic agitation 5 minutes, mixes; Add again 0.2g nano silicon, 0.04g bromcresol green, ultrasonic dispersion 3 times under normal temperature airtight condition, each 10 minutes, each ultrasonic time interval was 5 minutes, is configured to nitrite ion.Nitrite ion is uniformly coated on the PE of corona treatment film (45 dyne) surface with coating machine, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=85.38, a
*=11.87, b
*=113.45), (L=61.76, a
*=-30.98, b
*=68.80), (L=30.96, a
*=-4.45, b
*=-62.46).
Embodiment tri-
Take 2.5g polyamide, be dissolved in 5.0g ethanol, magnetic agitation 8 minutes, mixes; Add again 0.2g nano silicon, 0.04g bromcresol green, ultrasonic dispersion 3 times under normal temperature airtight condition, each 10 minutes, each ultrasonic time interval was 5 minutes, is configured to nitrite ion.Nitrite ion is uniformly coated on the PET of corona treatment film (50 dyne) surface with spin coating instrument, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=92.61, a
*=-3.46, b
*=54.18), (L=70.97, a
*=-42.99, b
*=-0.94), (L=63.79, a
*=-41.71, b
*=-33.48).
Embodiment tetra-
Take 2.1g polyamide, be dissolved in 2.5g butanols, magnetic agitation 8 minutes, mixes; Add again 0.1g bromcresol green, ultrasonic dispersion 2 times under normal temperature airtight condition, each 7 minutes, each ultrasonic time interval was 3 minutes, is configured to nitrite ion.Nitrite ion is uniformly coated on the PET of corona treatment film (50 dyne) surface with coating machine, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=89.41, a
*=3.93, b
*=96.06), (L=72.53, a
*=-31.81, b
*=55.44), (L=55.21, a
*=-55.81, b
*=3.80).
Embodiment five
Take 2.5g polyamide, be dissolved in 2.5g propyl alcohol, magnetic agitation 8 minutes, mixes; Add again 0.2g nano silicon, 0.1g bromcresol green, ultrasonic dispersion 3 times under normal temperature airtight condition, each 10 minutes, each ultrasonic time interval was 5 minutes, is configured to nitrite ion.Nitrite ion is uniformly coated on the PP of corona treatment film (48 dyne) surface with spin coating instrument, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=88.43, a
*=6.75, b
*=103.30), (L=59.20, a
*=-51.50, b
*=34.54), (L=38.79, a
*=-21.86, b
*=-56.18).
Embodiment six
Take 2.1g polyamide, be dissolved in 5.0g ethanol, magnetic agitation 8 minutes, mixes; Add 0.04g bromcresol green, under normal temperature airtight condition, ultrasonic dispersion 10 minutes, is configured to nitrite ion again.Nitrite ion is uniformly coated on the PP of corona treatment film (48 dyne) surface with coating machine, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=94.44, a
*=-3.19, b
*=37.86), (L=75.86, a
*=-30.80, b
*=-16.96), (L=73.26, a
*=-31.44, b
*=-25.70).
Embodiment seven
Take 2.1g acetate fiber resin, be dissolved in 5.0g ethanol, magnetic agitation 8 minutes, mixes; Add again 0.2g nano silicon, 0.1g bromcresol green, ultrasonic dispersion 3 times under normal temperature airtight condition, each 6 minutes, each ultrasonic time interval was 4 minutes, is configured to nitrite ion.Nitrite ion is uniformly coated on the PVC of corona treatment film (58 dyne) surface with coating machine, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=91.15, a
*=0.56, b
*=81.79), (L=73.97, a
*=-33.73, b
*=44.57), (L=53.40, a
*=-48.85, b
*=-30.99).
Embodiment eight
Take 2.5g acetate fiber resin, be dissolved in 2.5g ethanol, magnetic agitation 8 minutes, mixes; Add 0.04g bromcresol green, under normal temperature airtight condition, ultrasonic dispersion 10 minutes, is configured to nitrite ion again.Nitrite ion is printed on the PVC of corona treatment film (56 dyne) surface, makes change color label, the initial color of this label is yellow.
The fresh loach of splendid attire 20g in the closed container of 100mL, then this change color label is suspended in container.In 30 ℃, the climatic chamber of 50% relative humidity, place, and record the color of change color label in 0h, 8h and 20h, along with the degree of spoilage aggravation of loach, its color is changed to green by yellow, finally becomes blueness.Change color schematic diagram while being illustrated in figure 1 this change color label use.In the time of T=0h, 8h, 20h, the corresponding color of label is respectively (L=49.01, a
*=17.26, b
*=56.04), (L=54.30, a
*=-33.23, b
*=52.50), (L=36.26, a
*=9.04, b
*=-58.52).
By the above detailed description to the embodiment of the present invention, can understand the problem that the fresh and alive degree of current detection food takes time and effort that the invention solves, can intuitively identify easily food freshness, convenient and swift, cost is low, guarantees food security.
Be understandable that, above embodiment is only used to principle of the present invention is described and the illustrative embodiments that adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (7)
1. monitor a change color label for the fresh activity of food, for showing food freshness, it is characterized in that containing the nitrite ion of indicator, binder, solvent, auxiliary agent composition, nitrite ion comprises the component of following weight proportion:
Nitrite ion is applied or is printed on transparent food packing film, form change color label.
2. the change color label of the fresh activity of monitoring food according to claim 1, is characterized in that described indicator is bromcresol green; Described binder is the one in acrylate, polyamide or the acetate fiber resin of ethanol-soluble type; Described solvent is the one in ethanol, ethylene glycol, propyl alcohol or butanols; Described auxiliary agent is nano silicon.
3. the change color label of the fresh activity of monitoring food according to claim 1, is characterized in that described transparent food packing film is the one in polyethylene film, polypropylene film, polyvinyl chloride film or mylar.
4. the change color label of the fresh activity of monitoring food according to claim 1, while it is characterized in that described change color label for packaging for foodstuff, when food is fresh, this label color is yellow; In the time that food is putrid and deteriorated gradually during accumulating, the color of change color label becomes green gradually, then becomes blueness, is greater than 6 with the aberration of priming color.
5. a preparation method for the change color label of the arbitrary described fresh activity of monitoring food of claim 1-4, is characterized in that comprising the following steps:
(1) preparation of nitrite ion: under normal temperature, binder and solvent are positioned in closed container and are mixed, then add auxiliary agent and indicator, ultrasonic being uniformly dispersed obtains nitrite ion; The weight proportion of each component is:
(2) preparation of change color label: step (1) gained nitrite ion is applied or is printed on transparent food packing film, form change color label.
6. the preparation method of the change color label of the fresh activity of monitoring food according to claim 5, is characterized in that the described ultrasonic dispersion of step (1) is to adopt ultrasonic dispersions 1-3 time, 5-10 minute at every turn, at every turn interval time 2-5 minute.
7. the preparation method of the change color label of the fresh activity of monitoring food according to claim 5, it is characterized in that the described transparent food packing film of step (2) is applying or printing front surface carries out corona treatment, make more than the surface of transparent food packing film can reach 45 dyne.
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| CN105588834A (en) * | 2016-01-08 | 2016-05-18 | 江南大学 | Method for intelligently displaying carbon dioxide of respiratory climacteric type fresh-cut fruits and vegetables |
| CN105810086A (en) * | 2016-05-20 | 2016-07-27 | 新疆医科大学第附属医院 | Traditional Chinese medicine developing solution, color-changing label and medicine storage device |
| CN107478646A (en) * | 2017-08-14 | 2017-12-15 | 仲恺农业工程学院 | Freshness of meat indicating label, solution and preparation method for the indicating label |
| CN108896092A (en) * | 2018-04-23 | 2018-11-27 | 陈浩能 | A kind of measurement method, measuring system and storage device |
| CN109767688A (en) * | 2019-03-06 | 2019-05-17 | 武汉工程大学 | A kind of color indicating label and preparation method thereof monitoring Food Oxidation degree |
| CN110012763A (en) * | 2018-01-10 | 2019-07-16 | 中华映管股份有限公司 | Disease perceives bagging |
| CN112020738A (en) * | 2018-04-23 | 2020-12-01 | 陈浩能 | Method and apparatus for product monitoring |
| CN112662331A (en) * | 2020-12-18 | 2021-04-16 | 滕德辉 | Cold chain transportation safety label sticker and production process thereof |
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| CN105167111A (en) * | 2015-10-23 | 2015-12-23 | 天津科技大学 | Preparation method of water-absorbing antibacterial preservative paper capable of indicating freshness of fresh food |
| CN105588834A (en) * | 2016-01-08 | 2016-05-18 | 江南大学 | Method for intelligently displaying carbon dioxide of respiratory climacteric type fresh-cut fruits and vegetables |
| CN105588834B (en) * | 2016-01-08 | 2018-01-23 | 江南大学 | A kind of method of the carbon dioxide intelligent display of climacteric type fresh-cut fruit and vegetable |
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| CN108896092A (en) * | 2018-04-23 | 2018-11-27 | 陈浩能 | A kind of measurement method, measuring system and storage device |
| CN112020738A (en) * | 2018-04-23 | 2020-12-01 | 陈浩能 | Method and apparatus for product monitoring |
| CN109767688A (en) * | 2019-03-06 | 2019-05-17 | 武汉工程大学 | A kind of color indicating label and preparation method thereof monitoring Food Oxidation degree |
| CN112662331A (en) * | 2020-12-18 | 2021-04-16 | 滕德辉 | Cold chain transportation safety label sticker and production process thereof |
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